In celebration of the design duo's 28th birthday on June 13, we've pulled together some of our favorite looks that the twins have worn over the years.

March 13, 2013

March 13, 2013

While Mary-Kate and Ashley Olsen rose to fame through acting on the popular '90s series Full House, the twins have since become better known for their success in the fashion industry. They currently boast two sought-after brands, The Row and Elizabeth and James, and they have received the prestigious CFDA Womenswear Award. Come September, they will take on the beauty biz with the launch of their first fragrance for Sephora under their Elizabeth and James label. Click forward to see more of their best fashion moments.